MPI_Win_wait -  Completes an RMA exposure epoch


SYNOPSIS

       #include <mpi.h>
       int MPI_Win_wait(MPI_Win win)


INPUT PARAMETER

       win    - window object (handle)


NOTES

       Completes  an  RMA  exposure  epoch  started  by a call to
       MPI_WIN_POST  on  win.  This   call   matches   calls   to
       MPI_WIN_COMPLETE(win)  issued  by  each of the origin pro­
       cesses that were granted access to the window during  this
       epoch.  The  call  to  MPI_WIN_WAIT  will  block until all
       matching calls to  MPI_WIN_COMPLETE  have  occurred.  This
       guarantees  that all these origin processes have completed
       their RMA accesses to the  local  window.  When  the  call
       returns, all these RMA accesses will have completed at the
       target window.


NOTES FOR FORTRAN

       All MPI routines in  Fortran  (except  for  MPI_WTIME  and
       MPI_WTICK ) have an additional argument ierr at the end of
       the argument list.  ierr is an integer and  has  the  same
       meaning  as the return value of the routine in C.  In For­
       tran, MPI routines are subroutines, and are  invoked  with
       the call statement.

       All  MPI  objects  (e.g., MPI_Datatype , MPI_Comm ) are of
       type INTEGER in Fortran.


USAGE WITH IMPI EXTENSIONS

       The IMPI standard only supports MPI-1  functions.   Hence,
       this  function is currently not designed to operate within
       an IMPI job.


ERRORS

       If an error occurs in an MPI  function,  the  current  MPI
       error  handler  is  called to handle it.  By default, this
       error handler aborts the MPI job.  The error  handler  may
       be  changed with MPI_Errhandler_set ; the predefined error
       handler MPI_ERRORS_RETURN may be used to cause error  val­
       ues  to  be returned (in C and Fortran; this error handler
       is less useful in with the C++ MPI bindings.   The  prede­
       fined error handler MPI::ERRORS_THROW_EXCEPTIONS should be
       used in C++ if the error value  needs  to  be  recovered).
       Note  that  MPI does not guarantee that an MPI program can
       continue past an error.

       an  error  value;  C routines as the value of the function
       and Fortran routines in the last argument.  The C++  bind­
       ings  for  MPI  do not return error values; instead, error
       values are communicated by  throwing  exceptions  of  type
       MPI::Exception  (but not by default).  Exceptions are only
       thrown if the error value is not MPI::SUCCESS .

       Note that if the MPI::ERRORS_RETURN handler is set in C++,
       while  MPI functions will return upon an error, there will
       be no way to recover what the actual error value was.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_WIN
              - Invalid window.  A common error is to use a  null
              window in a call.
       MPI_ERR_EPOCH
              -  This  error indicates than an operation has been
              attempted on a "closed" window.  Certain  one-sided
              operations  can  only be performed on windows whose
              epoch has been started with MPI_Win_start.


SEE ALSO

       MPI_Put(3),         MPI_Get(3),         MPI_Win_create(3),
       MPI_Win_start(3),  MPI_Win_complete(3),  MPI_Win_fence(3),
       MPI_Win_free(3),                     MPI_Win_get_group(3),
       MPI_Win_get_group(3), MPI_Accumulate(3)


MORE INFORMATION

       For  more  information,  please see the official MPI Forum
       web site, which contains the text of both  the  MPI-1  and
       MPI-2  standards.  These documents contain detailed infor­
       mation about each MPI  function  (most  of  which  is  not
       duplicated in these man pages).

       http://www.mpi-forum.org/


LOCATION

       wwait.c


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